Book Image

Mastering Functional Programming

Book Image

Mastering Functional Programming

Overview of this book

Functional programming is a paradigm specifically designed to deal with the complexity of software development in large projects. It helps developers to keep track of the interdependencies in the code base and changes in its state in runtime. Mastering Functional Programming provides detailed coverage of how to apply the right abstractions to reduce code complexity, so that it is easy to read and understand. Complete with explanations of essential concepts, practical examples, and self-assessment questions, the book begins by covering the basics such as what lambdas are and how to write declarative code with the help of functions. It then moves on to concepts such as pure functions and type classes, the problems they aim to solve, and how to use them in real-world scenarios. You’ll also explore some of the more advanced patterns in the world of functional programming such as monad transformers and Tagless Final. In the concluding chapters, you’ll be introduced to the actor model, which you can implement in modern functional languages, and delve into parallel programming. By the end of the book, you will be able to apply the concepts of functional programming and object-oriented programming (OOP)in order to build robust applications.
Table of Contents (17 chapters)

Chapter 8

  1. The type classes repeat from project to project. Hence, it makes sense to unify them into libraries.
  2. foldLeft, foldRight, traverse.
  3. Composition of a list of effectful computations.
  4. flatMap, pure, tailRecM.
  5. Sequential composition of two computations, one of which depends on the result of another.
  6. Core package with type classes, syntax package with rich wrappers to inject syntax into effect types, instances package with the type class implementations for some effect types, data package with effect types for functional programming. Also, Cats has some auxiliary packages for more specific tasks not discussed in the book. Consult Cats documentation to learn about these.